Can my Cactus be Saved?!?

Can my Cactus be Saved?!?

Mon Feb 20, 2017 12:59 am

I know this looks so horrible... I came back from school for spring break (my mother kind of looks after it while I'm gone), and found it in this state.The top of it is all mush---feels like it could fall off any time. There's also a brown ooze dripping out. The rest of the plant is still the same color as before and firm (the base was already that faded color, from sunburn).I HAD been seeing mealybugs for this cactus from before (as you can see), but is this caused by them? Or mold, or rot?

If I were to put a knife to the top portion, would you think there's still a chance to salvage the rest of the cactus?Thank you in advance.